The first beta was released in 1989, and, as of this writing, has seen its most recent update in December 2020: version 5.1. if itself is a shell keyword, so you can find information about it with help if.if itself only branches based on whether the next command returns true ( 0 ) or false ( not zero ). In Bash else-if, there can be multiple elif blocks with a boolean expression for each of them. Learn more. [ -e FILE] True if FILE exists. The name Bash is an acronym for Bourne-Again SHell, a pun on the name Stephen Bourne, creator of one of Bash's predecessors. Bash Else If. es v. tr. Syntax of Bash Else IF – elif. 2. of a compound command OR function name { ## ksh style works in bash command1 command2 } OR function name() { ## bash-only hybrid command1 command2 } One Line Functions Syntax. [ -c FILE] True if FILE exists and is a character-special file. To bash is to hit very hard or to say unkind things about someone or something. bash on definition: 1. to continue doing something that is difficult, boring, or takes a long time: 2. to continue…. To strike with a heavy, crushing blow: The thug bashed the hood of the car with a sledgehammer. Bash Shell Scripting Definition Bash Bash is a command language interpreter. If elif if ladder appears like a conditional ladder. [ -f FILE] True if FILE exists and is a regular file. In bash you can do help test to see all the options it supports. [ -d FILE] True if FILE exists and is a directory. [ -b FILE] True if FILE exists and is a block-special file. They otherwise work the same, [ -e foo ] is equivalent to test -e foo. It is widely available on various operating systems and is a default command interpreter on most GNU/Linux systems. bash definition: 1. to hit hard: 2. to criticize someone severely: 3. a party: . The name is an acronym for the ‘Bourne-Again SHell’. Primary Meaning [ -a FILE] True if FILE exists. Bash up definition: If someone bashes you up , they attack you violently and injure you. Learn more. ; The statements that follow the then statement can be any valid UNIX command, any executable user program, any executable shell script, or any shell statement with the exception of fi. [ -g FILE] True if FILE exists and its SGID bit is set. It is also kind of a synonym for test. Following is the syntax of Else If statement in Bash Shell Scripting. Expressions may be unary or binary, and are formed from the following primaries. name() compound_command ## POSIX compliant ## see the bash man page for def. The only real difference between [and test should be that [requires a ] after your arguments, whereas test does not. 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